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Baglivo I, Quaranta VN, Dragonieri S, Colantuono S, Menzella F, Selvaggio D, Carpagnano GE, Caruso C. The New Paradigm: The Role of Proteins and Triggers in the Evolution of Allergic Asthma. Int J Mol Sci 2024; 25:5747. [PMID: 38891935 PMCID: PMC11171572 DOI: 10.3390/ijms25115747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/18/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Epithelial barrier damage plays a central role in the development and maintenance of allergic inflammation. Rises in the epithelial barrier permeability of airways alter tissue homeostasis and allow the penetration of allergens and other external agents. Different factors contribute to barrier impairment, such as eosinophilic infiltration and allergen protease action-eosinophilic cationic proteins' effects and allergens' proteolytic activity both contribute significantly to epithelial damage. In the airways, allergen proteases degrade the epithelial junctional proteins, allowing allergen penetration and its uptake by dendritic cells. This increase in allergen-immune system interaction induces the release of alarmins and the activation of type 2 inflammatory pathways, causing or worsening the main symptoms at the skin, bowel, and respiratory levels. We aim to highlight the molecular mechanisms underlying allergenic protease-induced epithelial barrier damage and the role of immune response in allergic asthma onset, maintenance, and progression. Moreover, we will explore potential clinical and radiological biomarkers of airway remodeling in allergic asthma patients.
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Affiliation(s)
- Ilaria Baglivo
- Centro Malattie Apparato Digerente (CEMAD) Digestive Disease Center, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Vitaliano Nicola Quaranta
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Respiratory Disease, University “Aldo Moro” of Bari, 70121 Bari, Italy (S.D.)
| | - Silvano Dragonieri
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Respiratory Disease, University “Aldo Moro” of Bari, 70121 Bari, Italy (S.D.)
| | - Stefania Colantuono
- Unità Operativa Semplice Dipartimentale Day Hospital (UOSD DH) Medicina Interna e Malattie dell’Apparato Digerente, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Francesco Menzella
- Pulmonology Unit, S. Valentino Hospital-AULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - David Selvaggio
- UOS di Malattie dell’Apparato Respiratorio Ospedale Cristo Re, 00167 Roma, Italy
| | - Giovanna Elisiana Carpagnano
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Respiratory Disease, University “Aldo Moro” of Bari, 70121 Bari, Italy (S.D.)
| | - Cristiano Caruso
- Unità Operativa Semplice Dipartimentale Day Hospital (UOSD DH) Medicina Interna e Malattie dell’Apparato Digerente, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
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Ouyang X, Reihill JA, Douglas LEJ, Martin SL. Airborne indoor allergen serine proteases and their contribution to sensitisation and activation of innate immunity in allergic airway disease. Eur Respir Rev 2024; 33:230126. [PMID: 38657996 PMCID: PMC11040391 DOI: 10.1183/16000617.0126-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 02/28/2024] [Indexed: 04/26/2024] Open
Abstract
Common airborne allergens (pollen, animal dander and those from fungi and insects) are the main triggers of type I allergic disorder in the respiratory system and are associated with allergic rhinitis, allergic asthma, as well as immunoglobulin E (IgE)-mediated allergic bronchopulmonary aspergillosis. These allergens promote IgE crosslinking, vasodilation, infiltration of inflammatory cells, mucosal barrier dysfunction, extracellular matrix deposition and smooth muscle spasm, which collectively cause remodelling of the airways. Fungus and insect (house dust mite and cockroaches) indoor allergens are particularly rich in proteases. Indeed, more than 40 different types of aeroallergen proteases, which have both IgE-neutralising and tissue-destructive activities, have been documented in the Allergen Nomenclature database. Of all the inhaled protease allergens, 85% are classed as serine protease activities and include trypsin-like, chymotrypsin-like and collagenolytic serine proteases. In this article, we review and compare the allergenicity and proteolytic effect of allergen serine proteases as listed in the Allergen Nomenclature and MEROPS databases and highlight their contribution to allergic sensitisation, disruption of the epithelial barrier and activation of innate immunity in allergic airways disease. The utility of small-molecule inhibitors of allergen serine proteases as a potential treatment strategy for allergic airways disease will also be discussed.
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Affiliation(s)
- Xuan Ouyang
- School of Pharmacy, Queen's University Belfast, Belfast, UK
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3
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Cladosporium protease/doxorubicin decorated Fe3O4@SiO2 nanocomposite: An efficient nanoparticle for drug delivery and combating breast cancer. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.104144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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4
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Cho JH, Jun NS, Park JM, Bang KI, Hong JW. Fungal Load of Groundwater Systems in Geographically Segregated Islands: A Step Forward in Fungal Control. MYCOBIOLOGY 2022; 50:345-356. [PMID: 36404906 PMCID: PMC9645270 DOI: 10.1080/12298093.2022.2123549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
The fungal distribution, diversity, and load were analyzed in the geographically segregated island groundwater systems in Korea. A total of 79 fungal isolates were secured from seven islands and identified based on the internal transcribed spacer (ITS) sequences. They belonged to three phyla (Ascomycota, Basidiomycota, and Chlorophyta), five classes, sixteen orders, twenty-two families, and thirty-one genera. The dominant phylum was Ascomycota (91.1%), with most fungi belonging to the Cladosporium (21.5%), Aspergillus (15.2%), and Stachybotrys (8.9%) genera. Cladosporium showed higher dominance and diversity, being widely distributed throughout the geographically segregated groundwater systems. Based on the diversity indices, the genera richness (4.821) and diversity (2.550) were the highest in the groundwater system of the largest scale. As turbidity (0.064-0.462) increased, the overall fungal count increased and the residual chlorine (0.089-0.308) had low relevance compared with the total count and fungal diversity. Cladosporium showed normal mycelial growth in de-chlorinated sterilized samples. Overall, if turbidity increases under higher fungal diversity, bio-deterioration in groundwater-supplying facilities and public health problems could be intensified, regardless of chlorine treatment. In addition to fungal indicators and analyzing methods, physical hydrostatic treatment is necessary for monitoring and controlling fungal contamination.
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Affiliation(s)
- Joong Hee Cho
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Nam Soo Jun
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Jong Myong Park
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Ki In Bang
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Ji Won Hong
- Department of Hydrogen and Renewable Energy, Kyungpook National University, Daegu, Republic of Korea
- Advanced Bio-resource Research Center, Kyungpook National University, Daegu, Republic of Korea
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Ma X, Hu J, Wang C, Gu Y, Cao S, Huang X, Wen Y, Zhao Q, Wu R, Zuo Z, Yu S, Shen L, Zhong Z, Peng G, Ling S. Innate and mild Th17 cutaneous immune responses elicited by subcutaneous infection of immunocompetent mice with Cladosporium cladosporioides. Microb Pathog 2021; 163:105384. [PMID: 34974124 DOI: 10.1016/j.micpath.2021.105384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 10/19/2020] [Accepted: 12/28/2021] [Indexed: 01/02/2023]
Abstract
Cladosporium cladosporioides is a dematiaceous hyphomycete that is pathogenic in the superficial and deep tissues of both immunodeficient and immunocompetent humans and animals. Our aim was to evaluate the antifungal immune responses elicited by C. cladosporioides in immunocompetent mice. Hence, we subcutaneously injected suspensions of C. cladosporioides spores into immunocompetent mice to investigate the anti-fungal immune responses in the skin. We collected skin tissue samples for histopathological examination, immunofluorescence staining, and quantitative real-time polymerase chain reaction analysis. We observed subcutaneous abscesses in mice after subcutaneous injection of C. cladosporioides. A large number of inflammatory cells, including dendritic cells, macrophages, and neutrophils, infiltrated the focal abscess, with comparatively few infiltrating inflammatory cells in the epidermal and dermal layers of the skin. We detected the expression of CD54 in the abscesses and the skin. Gene expression of the pattern recognition receptors Dectin-1 and TLR-2 was higher in infected mice than in controls. Gene expression of the cytokines IL-6, IL-1β, and IL-17A also increased after infection, suggesting that the Th17 signaling pathway may be involved in the anti-fungal response. Although the pathogenicity of C. cladosporioides in healthy mice was weak after subcutaneous infection, resulting in few serious pathological phenomena, it appears that innate and Th17 immune responses play important roles in the cutaneous host response to C. cladosporioides. These findings lay a foundation for further study of the pathogenic mechanism and treatment of C. cladosporioides infection.
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Affiliation(s)
- Xiaoping Ma
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Jing Hu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Chengdong Wang
- China Conservation and Research Center for the Giant Panda, Chengdu, Sichuan, 611800, China.
| | - Yu Gu
- College of Life Sciences, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Sanjie Cao
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiaobo Huang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yiping Wen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qin Zhao
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Rui Wu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhicai Zuo
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shumin Yu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Liuhong Shen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhijun Zhong
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guangneng Peng
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shanshan Ling
- China Conservation and Research Center for the Giant Panda, Chengdu, Sichuan, 611800, China
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6
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Boniek D, de Abreu CS, Dos Santos AFB, de Resende Stoianoff MA. Evaluation of microbiological air parameters and the fungal community involved in the potential risks of biodeterioration in a cultural heritage of humanity, Ouro Preto, Brazil. Folia Microbiol (Praha) 2021; 66:797-807. [PMID: 34131829 DOI: 10.1007/s12223-021-00880-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
The research of the microbiological air quality of a building considered a human historical and cultural heritage site by the United Nations Educational, Scientific, and Cultural Organization is fundamental for preventive conservation action, mainly because it identifies cultivable fungal species around the collections and suggests the appropriate treatment choice. This study investigated the air microbiological parameters inside the Nossa Senhora da Conceição Church and identified the population of airborne fungi. Sixty filamentous fungal isolates were detected with ten distinct taxa. The counts of colony forming units (CFUs) performed at 10 different points were in accordance with Brazilian legislation. In addition, the presence of two fungal species was detected colonizing artworks covered with gold leaves: Cladosporium cladosporioides and Aspergillus versicolor. Air quality monitoring inside the church was in accordance with the required Brazilian legislation standards. The composition of the filamentous fungal community included the presence of human fungal pathogens; for this reason, the use of personal protective equipment was recommended during the restoration work. Thus, characterization of the air microbiological parameters helps to preserve not only the building's collection, but also the health of the faithful, conservators-restorers, tourists, and researchers.
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Affiliation(s)
- Douglas Boniek
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, UFMG, Av. Antônio Carlos 6627, Belo Horizonte, Minas Gerais, CEP 31270-901, Brazil.
| | - Crísia Santos de Abreu
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, UFMG, Av. Antônio Carlos 6627, Belo Horizonte, Minas Gerais, CEP 31270-901, Brazil
| | - Antônio Fernando Batista Dos Santos
- Faculty of Engineering and Architecture, Education and Culture Foundation of Minas Gerais, FUMEC University, Cobre Street 200, Belo Horizonte, Minas Gerais, 30310-190, Brazil
| | - Maria Aparecida de Resende Stoianoff
- Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, UFMG, Av. Antônio Carlos 6627, Belo Horizonte, Minas Gerais, CEP 31270-901, Brazil
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7
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Li L, Guan K, Zheng SG. Biochemical Characteristics and Allergenic Activity of Common Fungus Allergens. Curr Protein Pept Sci 2020; 21:170-185. [PMID: 31309887 DOI: 10.2174/1389203720666190712121243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 05/26/2019] [Accepted: 06/20/2019] [Indexed: 12/27/2022]
Abstract
Fungi form a large kingdom with more than 1.5 million species. Fungal spores are universal atmospheric components and are generally recognized as important causes of allergic disorders, including allergic rhinitis, allergic rhinosinusitis, asthma, and allergic bronchopulmonary aspergillosis. The 4 genera which have the closest connection with allergic disorder are Cladosporium, Alternaria, Aspergillus and Penicillium. The cDNA sequences of many fungi allergens and the amino acids involved in their immunoglobulin E binding and T-cell activation have already been elucidated. Until now, 111 allergens from 29 fungal genera have been approved by the International Allergen Nomenclature Sub-committee. This review mainly focuses on the biochemical characteristics and allergenic activity of important allergens from common environmental fungi.
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Affiliation(s)
- Lisha Li
- Department of Allergy, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing Key Laboratory of Precision Medicine for Diagnosis and Treatment on Allergic Diseases, Beijing, 100730, China
| | - Kai Guan
- Department of Allergy, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing Key Laboratory of Precision Medicine for Diagnosis and Treatment on Allergic Diseases, Beijing, 100730, China
| | - Song Guo Zheng
- Ohio State College of Medicine, Ohio State University, Columbus, OH 43210, United States
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Dey D, Gupta Bhattacharya S. Allergenicity assessment of fungal species using immunoclinical and proteomic techniques: a study on Fusarium lateritium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2020; 30:545-557. [PMID: 31044611 DOI: 10.1080/09603123.2019.1609658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
Airborne fungal spores are extensively reported as the elicitors of respiratory allergies in human. Fusarium lateritium is one such fungal species reported for eliciting significant skin prick results from India. The present study aims to analyze the allergenic potential of F. lateritium followed by the identification of allergens. The total protein of F. lateritium was subjected to 1dimensional (1D) and 2D gel electrophoresis followed by corresponding IgE-specific immunoblots. We found 8 immunoreactive bands/zones in (1D) immunoblot using 11 F. lateritium-sensitised patient sera. In 1D immunoblot, a 34 kDa band was detected in >80% of the patients and hence considered as a potential allergen of F. lateritium. Corresponding 34 kDa spot in 2D-immunoblot was analyzed by mass spectrometric analysis and identified as Glyceraldehyde 3-phosphate dehydrogenase. The identified F. lateritium allergen holds the potential to instigate vaccine development for immunotherapy of F. lateritium sensitized patients.
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Affiliation(s)
- Debarati Dey
- Division of Plant Biology, Bose Institute (Main Campus) , Kolkata, India
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9
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Hadebe S, Brombacher F. Environment and Host-Genetic Determinants in Early Development of Allergic Asthma: Contribution of Fungi. Front Immunol 2019; 10:2696. [PMID: 31824491 PMCID: PMC6879655 DOI: 10.3389/fimmu.2019.02696] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 11/01/2019] [Indexed: 12/16/2022] Open
Abstract
Asthma is a chronic debilitating airway disease affecting millions of people worldwide. Although largely thought to be a disease of the first world, it is now clear that it is on the rise in many middle- and lower-income countries. The disease is complex, and its etiology is poorly understood, which explains failure of most treatment strategies. We know that in children, asthma is closely linked to poor lung function in the first 3-years of life, when the lung is still undergoing post-natal alveolarization phase. Epidemiological studies also suggest that environmental factors around that age do play a critical part in the establishment of early wheezing which persists until adulthood. Some of the factors that contribute to early development of asthma in children in Western world are clear, however, in low- to middle-income countries this is likely to differ significantly. The contribution of fungal species in the development of allergic diseases is known in adults and in experimental models. However, it is unclear whether early exposure during perinatal or post-natal lung development influences a protective or promotes allergic asthma. Host immune cells and responses will play a crucial part in early development of allergic asthma. How immune cells and their receptors may recognize fungi and promote allergic asthma or protect by tolerance among other immune mechanisms is not fully understood in this early lung development stage. The aim of this review is to discuss what fungal species are present during early exposure as well as their contribution to the development of allergic responses. We also discuss how the host has evolved to promote tolerance to limit hyper-responsiveness to innocuous fungi, and how host evasion by fungi during early development consequentially results in allergic diseases.
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Affiliation(s)
- Sabelo Hadebe
- Division of Immunology and South African Medical Research Council (SAMRC) Immunology of Infectious Diseases, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Frank Brombacher
- Division of Immunology and South African Medical Research Council (SAMRC) Immunology of Infectious Diseases, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town, South Africa
- Division of Immunology, Faculty of Health Sciences, Institute of Infectious Diseases and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- Faculty of Health Sciences, Wellcome Centre for Infectious Diseases Research in Africa (CIDRI-Africa), Institute of Infectious Diseases and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
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10
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Krysko O, Teufelberger A, Van Nevel S, Krysko DV, Bachert C. Protease/antiprotease network in allergy: The role of Staphylococcus aureus protease-like proteins. Allergy 2019; 74:2077-2086. [PMID: 30888697 DOI: 10.1111/all.13783] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/10/2019] [Accepted: 02/22/2019] [Indexed: 12/18/2022]
Abstract
Staphylococcus aureus is being recognized as a major cofactor in atopic diseases such as atopic dermatitis, chronic rhinosinusitis with nasal polyps, and asthma. The understanding of the relationship between S aureus virulence factors and the immune system is continuously improving. Although the precise mechanism of the host's immune response adaptation to the variable secretion profile of S aureus strains continues to be a matter of debate, an increasing number of studies have reported on central effects of S aureus secretome in allergy. In this review, we discuss how colonization of S aureus modulates the innate and adaptive immune response, thereby predisposing the organism to allergic sensitization and disrupting immune tolerance in the airways of patients with asthma and chronic rhinosinusitis with nasal polyps. Next, we provide a critical overview of novel concepts dealing with S aureus in the initiation and persistence of chronic rhinosinusitis with nasal polyps and asthma. The role of the S aureus serine protease-like proteins in the initiation of a type 2 response and the contribution of the IL-33/ST2 signaling axis in allergic responses induced by bacterial allergens are discussed.
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Affiliation(s)
- Olga Krysko
- Upper Airways Research Laboratory, Department Head and Skin Ghent University Ghent Belgium
| | - Andrea Teufelberger
- Upper Airways Research Laboratory, Department Head and Skin Ghent University Ghent Belgium
| | - Sharon Van Nevel
- Upper Airways Research Laboratory, Department Head and Skin Ghent University Ghent Belgium
| | - Dmitri V. Krysko
- Institute of Biology and Biomedicine National Research Lobachevsky State University of Nizhny Novgorod Nizhny Novgorod Russian Federation
- Cell Death Investigation and Therapy Laboratory, Department of Human Structure and Repair Ghent University Ghent Belgium
- Cancer Research Institute Ghent Ghent Belgium
| | - Claus Bachert
- Upper Airways Research Laboratory, Department Head and Skin Ghent University Ghent Belgium
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Prenafeta-Boldú FX, Roca N, Villatoro C, Vera L, de Hoog GS. Prospective application of melanized fungi for the biofiltration of indoor air in closed bioregenerative systems. JOURNAL OF HAZARDOUS MATERIALS 2019; 361:1-9. [PMID: 30176406 DOI: 10.1016/j.jhazmat.2018.08.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 07/25/2018] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
Cultures of melanized fungi representative of the black yeast orders Capnodiales (Cladosporium cladosporioides and Neohortaea acidophila) and Chaetothyriales (Cladophialophora psammophila) were confined with indoor air from the laboratory during 48 h. Volatile organic compounds (VOCs) from the headspace were analyzed by thermal desorption gas chromatography time-of-fly mass spectrometry (TD-GC-ToFMS, detection threshold 0.1 μg m-3) and compared against an abiotic control. A mixture of 71 VOCs were identified and quantified in the indoor air (total concentration 1.4 mg m-3). Most of these compounds were removed in the presence of fungal biomass, but 40 newly formed putative volatile metabolites were detected, though at comparatively low total concentrations (<50 μg m-3). The VOCs emission profile of C. cladosporioides, a ubiquitous and well-known species often associated to the sick building syndrome, was consistent with previous literature reports. The specialized C. psammophila and N. acidophila, isolated respectively from gasoline polluted soil and from lignite, displayed rather specific VOCs emission profiles. Mass balances on the fungal uptake and generation of VOCs resulted in overall VOCs removal efficiencies higher than 96% with all tested fungi. Applied aspects and biosafety issues concerning the suitability of black yeasts for the biofiltration of indoor air have been discussed.
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Affiliation(s)
- Francesc X Prenafeta-Boldú
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, E08140 Caldes de Montbui, Catalonia, Spain.
| | - Núria Roca
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, E08140 Caldes de Montbui, Catalonia, Spain
| | - Carmen Villatoro
- Centre of Competence of Molecular Odour Evaluation, Odournet S.L., Av. Corts Catalanes 5, 08173 Sant Cugat del Vallès, Barcelona, Catalonia, Spain
| | - Luciano Vera
- Centre of Competence of Molecular Odour Evaluation, Odournet S.L., Av. Corts Catalanes 5, 08173 Sant Cugat del Vallès, Barcelona, Catalonia, Spain
| | - G Sybren de Hoog
- Westerdijk Fungal Biodiversity Institute, 3584 CT, Utrecht, The Netherlands; Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, 1098 XH, Amsterdam, The Netherlands
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12
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Dey D, Saha B, Sircar G, Ghosal K, Bhattacharya SG. Mass spectrometry-based identification of allergens from Curvularia pallescens, a prevalent aerospore in India. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:869-79. [DOI: 10.1016/j.bbapap.2016.03.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 02/26/2016] [Accepted: 03/17/2016] [Indexed: 12/01/2022]
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13
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Yeh CC, Tai HY, Chou H, Wu KG, Shen HD. Vacuolar Serine Protease Is a Major Allergen of Fusarium proliferatum and an IgE-Cross Reactive Pan-Fungal Allergen. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2016; 8:438-44. [PMID: 27334782 PMCID: PMC4921698 DOI: 10.4168/aair.2016.8.5.438] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 11/11/2015] [Accepted: 12/15/2015] [Indexed: 11/20/2022]
Abstract
Purpose Fusarium species are among prevalent airborne fungi and causative agents of human respiratory atopic disorders. We previously identified a 36.5-kDa F. proliferatum component recognized by IgE antibodies in 9 (53%) of the 17 F. proliferatum-sensitized atopic serum samples. The purpose of this study is to characterize the 36.5-kDa allergen of F. proliferatum. Methods Characterization of allergens and determination of IgE cross-reactivity were performed by cDNA cloning/expression and immunoblot inhibition studies. Results Based on the finding that the 36.5-kDa IgE-binding component reacted with the mouse monoclonal antibody FUM20 against fungal vacuolar serine protease allergens, the cDNA of F. proliferatum vacuolar serine protease (Fus p 9.0101) was subsequently cloned. Nine serum samples from respiratory atopic patients with IgE binding to the vacuolar serine protease allergen of Penicillium chrysogenum (Pen ch 18) also showed IgE-immunoblot reactivity to rFus p 9.0101. The purified rFus p 9.0101 can inhibit IgE and FUM20 binding to the 36.5-kDa component of F. proliferatum. Thus, a novel and important Fus p 9.0101 was identified. The rPen ch 18 can inhibit IgE binding to Fus p 9.0101. It indicates that IgE cross-reactivity between Fus p 9.0101 and Pen ch 18 also exists. Furthermore, neither rFus p 9.0101 K88A nor rPen ch 18 K89A mutants inhibited IgE binding to rFus p 9.0101. Lys88 was considered a critical core amino acid in IgE binding to r Fus p 9.0101 and a residue responsible for IgE cross-reactivity between Fus p 9.0101 and Pen ch 18 allergens. Conclusions Results obtained from this study indicate that vacuolar serine protease may be a major allergen of F. proliferatum and an important IgE cross-reactive pan-fungal allergen, and provide important bases for clinical diagnosis of fungal allergy.
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Affiliation(s)
- Chang Ching Yeh
- Department of Obstetrics and Gynecology, Taipei Veterans General Hospital and Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, R.O.C
| | - Hsiao Yun Tai
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Hong Chou
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
| | - Keh Gong Wu
- Department of Pediatrics, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, R.O.C
| | - Horng Der Shen
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
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14
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Abstract
A gathering body of evidence has repeatedly revealed associations between indoor fungi and initiation, promotion, and exacerbation of allergic respiratory disease. The relationship between the exposure and outcome are complicated by the difficulties in measuring both exposure and outcome, the multifactorial nature of the disease, and the wide range of potential confounders. New technologies are becoming available that may enable better measurement of exposure and tighter case definitions so as to build more confidence in the associations discovered. The growing strength of the evidence base will aid the design of future public health interventions and generate new hypotheses on the cause of the rapid increase in allergic respiratory disease prevalence.
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15
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Zabka M, Pavela R, Prokinova E. Antifungal activity and chemical composition of twenty essential oils against significant indoor and outdoor toxigenic and aeroallergenic fungi. CHEMOSPHERE 2014; 112:443-8. [PMID: 25048938 DOI: 10.1016/j.chemosphere.2014.05.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 05/02/2014] [Accepted: 05/04/2014] [Indexed: 05/18/2023]
Abstract
Health affecting, loss-inducing or otherwise harmful fungal pathogens (molds) pose a serious challenge in many areas of human activities. On the contrary, frequent use of synthetic fungicides is undesirable in some cases and may be equally problematic. Moreover, the ever more increasing fungal resistance against commercial synthetic fungicides justifies development of rising efforts to seek new effective, while environmentally friendly alternatives. Botanical fungicides based on Essential oils (EOs) undoubtedly provide such an alternative. The study explores the efficacy of 20 EOs against Alternaria alternata, Stachybotrys chartarum, Cladosporium cladosporioides and Aspergillus niger, related to abundance of majority active substances. Minimum inhibitory concentration (MIC100 and MIC50) was evaluated. GC-MS analysis revealed high abundance of highly effective phenolic compounds whose different molecular structures correlates with differences in EOs efficacy. The efficacy of some EOs, observed in our study, can be similar to the levels of some synthetic fungicides used in medicine and agriculture e.g. sometimes problematic azole-based formulations. Thanks to the EOs environmental safety and natural origin, they offer the potential to become an alternative where the use of synthetic fungicides is impossible for various reasons.
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Affiliation(s)
- Martin Zabka
- Crop Research Institute, Drnovska 507, Prague 161 06, Czech Republic.
| | - Roman Pavela
- Crop Research Institute, Drnovska 507, Prague 161 06, Czech Republic
| | - Evzenie Prokinova
- Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Kamycka 129, Prague 160 00, Czech Republic
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16
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Shi L, Li R, Liao S, Bai L, Lu Q, Chen B. Prb1, a subtilisin-like protease, is required for virulence and phenotypical traits in the chestnut blight fungus. FEMS Microbiol Lett 2014; 359:26-33. [DOI: 10.1111/1574-6968.12547] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 07/21/2014] [Accepted: 07/24/2014] [Indexed: 01/19/2023] Open
Affiliation(s)
- Liming Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
| | - Ru Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
| | - Suhuan Liao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
| | - Lingyun Bai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
| | - Qunfeng Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
| | - Baoshan Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory for Microbial and Plant Genetic Engineering; Ministry of Education; College of Life Science and Technology; Guangxi University; Nanning China
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17
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Chou H, Wu KG, Yeh CC, Tai HY, Tam MF, Chen YS, Shen HD. The transaldolase, a novel allergen of Fusarium proliferatum, demonstrates IgE cross-reactivity with its human analogue. PLoS One 2014; 9:e103488. [PMID: 25075521 PMCID: PMC4116196 DOI: 10.1371/journal.pone.0103488] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 07/02/2014] [Indexed: 11/23/2022] Open
Abstract
Fusarium species are among airborne fungi and recognized as causative agents of human atopic disorders. However, Fusarium allergens have not been well characterized and the lack of information limits clinical diagnosis and treatment of fungal allergy. The purpose of this study is to identify and characterize important allergens of F. proliferatum. IgE-reacting F. proliferatum components were identified by immunoblot using serum samples from patients of respiratory atopic diseases. Characterization of allergens and determination of IgE cross-reactivity were performed by cDNA cloning, then homologous expression and immunoblot inhibition studies. We identified nine different F. proliferatum components that can be recognized by IgE antibodies in 17 (28%) of the 60 atopic sera tested. Components with molecular masses of about 43, 37.5 and 36.5 kDa with IgE-binding frequencies of about 88, 47 and 53%, respectively, were considered as important allergens of F. proliferatum. The 37.5 kDa IgE-binding component was putatively considered as a transaldolase protein of F. proliferatum. The full-length cDNA of F. proliferatum transaldolase was subsequently cloned. It encodes an open reading frame of 312 amino acids and has sequence identifies of 73 and 61%, respectively, with Cladosporium and human transaldolases. The purified recombinant F. proliferatum transaldolase can inhibit the IgE-binding against the 37.5 kDa component of F. proliferatum and the transaldolase allergen from Cladosporium cladosporioides. More importantly, the recombinant F. proliferatum transaldolase can inhibit IgE-binding against human transaldolase in a concentration-dependent manner. Thus, a novel and important F. proliferatum transaldolase allergen was identified. In addition to IgE cross-reactivity between the Fusarium and the Cladosporium transaldolase allergens, IgE cross-reactivity between the Fusarium and the human transaldolases also exists and might contribute to atopic manifestations in the absence of exogenous allergen exposure.
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Affiliation(s)
- Hong Chou
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
| | - Keh-Gong Wu
- Department of Pediatrics, Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan, R.O.C.
| | - Chang-Ching Yeh
- Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
| | - Hsiao-Yun Tai
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
| | - Ming F. Tam
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
| | - Yu-Sen Chen
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
| | - Horng-Der Shen
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
- * E-mail:
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18
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Abstract
Activation of receptors of the innate immune system is a critical step in the initiation of immune responses. It has been shown that dominant allergens have properties that could allow them to interact with toll-like and C-type lectin receptors to favour Th2-biased responses and many bind lipids and glycans that could associate with ligands to mimic pathogen-associated microbial patterns. In accord with the proposed allergen-specific innate interactions it has been shown that the immune responses to different allergens and antigens from the same source are not necessarily coordinately regulated.
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Affiliation(s)
- W R Thomas
- Centre for Child Health Research, University of Western Australia, Telethon Institute for Child Health Research, Subiaco, Western Australia, Australia.
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19
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Thornton CR, Wills OE. Immunodetection of fungal and oomycete pathogens: established and emerging threats to human health, animal welfare and global food security. Crit Rev Microbiol 2013; 41:27-51. [PMID: 23734714 DOI: 10.3109/1040841x.2013.788995] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Filamentous fungi (moulds), yeast-like fungi, and oomycetes cause life-threatening infections of humans and animals and are a major constraint to global food security, constituting a significant economic burden to both agriculture and medicine. As well as causing localized or systemic infections, certain species are potent producers of allergens and toxins that exacerbate respiratory diseases or cause cancer and organ damage. We review the pathogenic and toxigenic organisms that are etiologic agents of both animal and plant diseases or that have recently emerged as serious pathogens of immunocompromised individuals. The use of hybridoma and phage display technologies and their success in generating monoclonal antibodies for the detection and control of fungal and oomycete pathogens are explored. Monoclonal antibodies hold enormous potential for the development of rapid and specific tests for the diagnosis of human mycoses, however, unlike plant pathology, their use in medical mycology remains to be fully exploited.
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20
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Chou H, Tam MF, Chiang CH, Chou CT, Tai HY, Shen HD. Transaldolases are novel and immunoglobulin E cross-reacting fungal allergens. Clin Exp Allergy 2012; 41:739-49. [PMID: 21488999 DOI: 10.1111/j.1365-2222.2011.03698.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Mould-induced atopic respiratory diseases are a worldwide problem. Characterization of fungal allergens is of major clinical importance. OBJECTIVE We identified a novel transaldolase family allergen of Cladosporium and Penicillium species. METHODS Fungal allergens were identified by immunoblotting, peptide mass mapping and partial sequencing, cDNA cloning and IgE epitope mapping. RESULTS A 36.5 kDa IgE-binding component in a partially purified C. cladosporioides preparation was identified. Mass spectrometric analyses suggest that this novel IgE-reacting allergen is a transaldolase. A corresponding full-length 1246 bp cDNA encoding a polypeptide of 325 residues was isolated. The newly identified transaldolase allergen has been designated as Cla c 14.0101. The cDNA encoding the Pencillium chrysogenum transaldolase was isolated by RT-PCR according to the cDNA sequence encoding a P. chrysogenum Wisconsin 54-1255 hypothetical protein. The purified rCla c 14.0101 protein reacted with IgE antibodies in 10 (38%) of 26 Cladosporium cladosporioides-sensitized asthmatic patients. Nine of the 10 rCla c 14.0101-positive sera have IgE binding against the recombinant Penicillium transaldolase (rPen ch 35.0101). Among the eight fungal transaldolase-positive sera tested, three showed IgE binding against the recombinant human transaldolase. To determine cross-reactivity between the Cladosporium and Penicillium fungi, IgE cross-reactivity was detected between these two fungal transaldolase allergens by inhibition assays. Both the N- and the C-terminal fragments of Cla c 14.0101 were recognized by IgE antibodies. The C-terminal IgE-reacting determinant was narrowed down to a region encompassing Thr257 to Ser278 of Cla c 14.0101. It was mapped onto a loop-like structure of a 3D model constructed for Cla c 14.0101. CONCLUSION AND CLINICAL RELEVANCE We identified transaldolase as a novel and IgE cross-reactive allergen family of C. cladosporioides and P. chrysogenum. In addition, an IgE-reacting fragment (Thr257 to Ser278) was pinpointed to a loop-like structure on Cla c 14.0101. Results obtained provide important information in clinical mould allergy.
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Affiliation(s)
- H Chou
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
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21
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22
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Role of Allergen Source-Derived Proteases in Sensitization via Airway Epithelial Cells. J Allergy (Cairo) 2012; 2012:903659. [PMID: 22523502 PMCID: PMC3303585 DOI: 10.1155/2012/903659] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 09/14/2011] [Accepted: 10/04/2011] [Indexed: 12/12/2022] Open
Abstract
Protease activity is a characteristic common to many allergens. Allergen source-derived proteases interact with lung epithelial cells, which are now thought to play vital roles in both innate and adaptive immune responses. Allergen source-derived proteases act on airway epithelial cells to induce disruption of the tight junctions between epithelial cells, activation of protease-activated receptor-2, and the production of thymic stromal lymphopoietin. These facilitate allergen delivery across epithelial layers and enhance allergenicity or directly activate the immune system through a nonallergic mechanism. Furthermore, they cleave regulatory cell surface molecules involved in allergic reactions. Thus, allergen source-derived proteases are a potentially critical factor in the development of allergic sensitization and appear to be strongly associated with heightened allergenicity.
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23
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Park HK, Cho MK, Park MK, Kang SA, Kim YS, Kim KU, Lee MK, Ock MS, Cha HJ, Yu HS. A 24 kDa excretory-secretory protein of Anisakis simplex larvae could elicit allergic airway inflammation in mice. THE KOREAN JOURNAL OF PARASITOLOGY 2011; 49:373-80. [PMID: 22355204 PMCID: PMC3279675 DOI: 10.3347/kjp.2011.49.4.373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 09/19/2011] [Accepted: 09/22/2011] [Indexed: 11/23/2022]
Abstract
We have reported that a 24 kDa protein (22U homologous; As22U) of Anisakis simplex larvae could elicit several Th2-related chemokine gene expressions in the intestinal epithelial cell line which means that As22U may play a role as an allergen. In order to determine the contribution of As22U to allergic reactions, we treated mice with 6 times intra-nasal application of recombinant As22U (rAs22U). In the group challenged with rAs22U and ovalbumin (OVA), the number of eosinophils in the bronchial alveolar lavage fluid (BALF) was significantly increased, as compared to the group receiving only OVA. In addition, mice treated with rAs22U and OVA showed significantly increased airway hyperresponsiveness. Thus, severe inflammation around the airway and immune cell recruitment was observed in mice treated with rAs22U plus OVA. The levels of IL-4, IL-5, and IL-13 cytokines in the BALF increased significantly after treatment with rAs22U and OVA. Similarly, the levels of anti-OVA specific IgE and IgG1 increased in mice treated with rAs22U and OVA, compared to those treated only with OVA. The Gro-α (CXCL1) gene expression in mouse lung epithelial cells increased instantly after treatment with rAs22U, and allergy-specific chemokines eotaxin (CCL11) and thymus-and-activation-regulated-chemokine (CCL17) gene expressions significantly increased at 6 hr after treatment. In conclusion, rAs22U may induce airway allergic inflammation, as the result of enhanced Th2 and Th17 responses.
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Affiliation(s)
- Hye-Kyung Park
- Department of Internal Medicine, Pusan National University, Yangsan 626-870, Korea
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24
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Klein SG, Hennen J, Serchi T, Blömeke B, Gutleb AC. Potential of coculture in vitro models to study inflammatory and sensitizing effects of particles on the lung. Toxicol In Vitro 2011; 25:1516-34. [PMID: 21963807 DOI: 10.1016/j.tiv.2011.09.006] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Revised: 07/18/2011] [Accepted: 09/06/2011] [Indexed: 12/30/2022]
Abstract
Exposure to particulate matter (PM) like nanoparticles (NPs) has increased in the last century due to increased combustion processes, road traffic, etc. In addition, the progress in chemical and cosmetic industry led to many new compounds, e.g. fragrances, which humans are exposed to every day. Many chemicals are known to act as contact and some as respiratory sensitizers, causing allergic reactions. Exposure to small particles of less than 100 nm in diameter is linked with an increased risk of respiratory diseases, such as asthma or rhinitis. To date already more than 1000 customer products contain eNPs without knowing much about the health effects. In comparison to chemicals, the mechanisms by which PM and eNPs can cause sensitization are still not fully understood. Validated and regulatory accepted in vitro models to assess this hazard in its full range are still missing. While a huge number of animal studies contributed to our knowledge about sensitization processes, knowledge on involved cellular mechanisms is still limited. In this review relevant in vitro models to study and elucidate these mechanisms in more detail are presented and their potential to serve as part of a tiered testing strategy is discussed.
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Affiliation(s)
- Sebastian G Klein
- Department Environment and Agro-biotechnologies (EVA), Centre de Recherche Public, Gabriel Lippmann, 41 rue du Brill, L-4422 Belvaux, Luxembourg
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25
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Fungal proteases and their pathophysiological effects. Mycopathologia 2011; 171:299-323. [PMID: 21259054 DOI: 10.1007/s11046-010-9386-2] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 12/02/2010] [Indexed: 12/14/2022]
Abstract
Proteolytic enzymes play an important role in fungal physiology and development. External digestion of protein substrates by secreted proteases is required for survival and growth of both saprophytic and pathogenic species. Extracellular serine, aspartic, and metalloproteases are considered virulence factors of many pathogenic species. New findings focus on novel membrane-associated proteases such as yapsins and ADAMs and their role in pathology. Proteases from fungi induce inflammatory responses by altering the permeability of epithelial barrier and by induction of proinflammatory cytokines through protease-activated receptors. Many fungal allergens possess proteolytic activity that appears to be essential in eliciting Th2 responses. Allergenic fungal proteases can act as adjuvants, potentiating responses to other allergens. Proteolytic enzymes from fungi contribute to inflammation through interactions with the kinin system as well as the coagulation and fibrinolytic cascades. Their effect on the host protease-antiprotease balance results from activation of endogenous proteases and degradation of protease inhibitors. Recent studies of the role of fungi in human health point to the growing importance of proteases not only as pathogenic agents in fungal infections but also in asthma, allergy, and damp building related illnesses. Proteolytic enzymes from fungi are widely used in biotechnology, mainly in food, leather, and detergent industries, in ecological bioremediation processes and to produce therapeutic peptides. The involvement of fungal proteases in diverse pathological mechanisms makes them potential targets of therapeutic intervention and candidates for biomarkers of disease and exposure.
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26
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Jacquet A. Interactions of airway epithelium with protease allergens in the allergic response. Clin Exp Allergy 2010; 41:305-11. [PMID: 21121984 DOI: 10.1111/j.1365-2222.2010.03661.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Among the apparently innocuous environmental proteins routinely inhaled by human subjects, only a small proportion of these antigens triggers allergy in susceptible individuals. Although the molecular basis of the allergenicity of these airborne proteins remains to be fully characterized, numerous studies suggest that the ability of such proteins to promote allergic responses is at least due to their proteolytic activity. This review will summarize insights into the interactions of protease allergens with the respiratory epithelium. In addition to their capacity to facilitate their antigen presentation through epithelial barrier degradation, protease allergens can directly activate airway mucosal surfaces to recruit inflammatory cells and to initiate the airway remodelling process. A greater understanding of the effects of protease allergens in the airways inflammation as well as on the relevant targets could define novel therapeutic strategies for the treatment allergic asthma.
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Affiliation(s)
- A Jacquet
- Department of Medicine, Division of Allergy and Clinical Immunology, Faculty of Medicine, Chulalongkorn University, Pathumwan, Bangkok, Thailand.
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27
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Pöll V, Denk U, Shen HD, Panzani RC, Dissertori O, Lackner P, Hemmer W, Mari A, Crameri R, Lottspeich F, Rid R, Richter K, Breitenbach M, Simon-Nobbe B. The vacuolar serine protease, a cross-reactive allergen from Cladosporium herbarum. Mol Immunol 2009; 46:1360-73. [DOI: 10.1016/j.molimm.2008.11.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 11/24/2008] [Accepted: 11/25/2008] [Indexed: 11/30/2022]
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28
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Lys89, Lys90, and Phe91 are critical core amino acid residues of the Pen ch 18 major fungal allergen recognized by human IgE antibodies. Biochem Biophys Res Commun 2008; 375:671-4. [DOI: 10.1016/j.bbrc.2008.08.097] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 08/17/2008] [Indexed: 10/21/2022]
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